11.   A maintenance worker was killed during the incident.

12.   A powerful explosion at a northwest Harris County metal forging plant killed eight workers and injured two others, authorities said Monday.

13.   A team has remained there, in virtual isolation, since six Red Cross workers were killed in December and other international groups left.

14.   A team has remained there in virtual isolation since six Red Cross workers were killed in December and all other international groups left.

15.   After six Red Cross workers were killed in their sleep last month, all Western aid organizations pulled out of Chechnya.

16.   After six Red Cross workers were killed providing relief aid in Chechnya late last year, the organization has become more concerned about the safety of its representatives.

17.   During maintenance, two contracted workers were killed in an explosion, the cause of which is still being investigated.

18.   Equilon Enterprises, the managing partner, also operates an Anacortes refinery where an explosion in November killed six workers.

19.   Four United Nations relief workers were killed.

20.   Four workers were killed last year removing mines.